Gas-burning steam-generator



(No Model.)1 W. M. BROWN.

GAS BURNING STEAM GENERATR.

Clan f N, PETERS4 Pnnlo-ulhagnpher, washington. uc.

. use the same, reference being had to the aecom-v UNrrnD 'STATI-s PATENT Ormea.

vVVAL'IER MORTON BROWN, OF ALBANY, NEW YORK.

GAS=BURNING STEAIVFGENERATOR.

SPECIFICATION forming part of Letters Patent No. 392,986, dated November 20,1888.

Application tiled May 23, 1888. Serial No. 274,750.

To a/ZZ whom it may concern,.-

Be it known that I, WALTER MoRToN BROWN, a citizen of the United States, residing at Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Gas Burning Steam-Generators; and I do declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and panying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The object of my invention is lto provide a steam-boiler especially adapted to burn gas as fuel, so arranged and constructed that under each water-tube shall be placed a gaspipe with burners, and over each water-tube a hood or bonnet so constructed and placed that it will compel the gas-dame to surround the water-tube and having conduits proceeding therefrom, so that the products of combustion shall be carried away and discharged beyond the -spaces formed between the water-tubes, to the end that the products of combustion shall not be allowed to intermix with the fiames'burning at any of the burners.

I accomplish the object sought by means of the mechanism illustrated in the drawings herewith, similar figures referring to similar parts throughout the several views, and inl which- Figurel shows a side view of my boiler, showing it to be of the water-tube type, the water-tubes having hoods in form of an inverted trough over each water-tube and conduits passing from said hoods to a point above the topmost hood, and gas-pipes under each water-tube, the gas-pipes being introduced through the rear water-head. Fig. 2 shows a vertical sectional view of my boiler, taken on lineX X of Fig. 1, and shows the general arrangement of the water-tubes,hoods,gaspipes, and conduits for the passage of the products of combustion, said conduits passing through a longitudinal partition laid above the watertubes and below the water-drums and discharging their contents into the chamber' farmed by saids partition. Fig. 3 shows one form of hood that may be used, having a cham- (No model.)

ber over the hood and an escape-conduit. Fig. 4 shows another and Fig. 5 still another form of hood that may be used, Fig. 5 showing a simple box with a conduit rising from its top.

In the drawings, the numeral 1 shows the body of the steam-boiler; 2, the steam and water drums; 3, the hoods or bonnets over the water-tubes; 4, the water-tubes; 5, the gas-pipes under the water-tubes, having perforations whereat the gas maybe burned; 6, the longitudinal partition laid above the water-tubes and below the water-drums; 7, the escapeconduits for the escape of the products of combustion from under the hoods; 8, conduits rising from the partition and allowing of the escape of the air from between the water-tubes; 9, openings in the partition to allow of the escape of a part of the air from between the water-tubes into the chamber above the partition; 10, rods holding the partition in position; 11, a nut turned upon the ends of the conduits passing through the tops of the hoods to hold them and the hoods in position; 12, openings in those forms of hoods shown in Figs. 3 and 4; 13, the gas-supply pipe; 14, the water-heads of the boiler; 15, a stringer laid over the top of the boiler, to which rods 10 are attached; 16, hand-hole plates set opposite the ends of each water-tube in the front and rear faces of the water-heads.

The operation of my invention is as follows: The gas being lighted, the dames impinge upon the bottoms of the water-tubes and pass upward and are compelled by the hoods to pass with the products of combustion under the hoods and completely around the watertubes. 'The products of combustion are then passed upward through the conduits 7,are discharged into the chamber formed by the partition 6, and from thence out at the chimneyfine. Thus the spaces between the water-tubes are always filled with fresh air with which to feed the flames burning at the burners, the fresh air entering from the bottom of the boiler.

' A part of this fresh air is also allowed to pass out from between the water-tubes through the conduits 8 and the openings 9 in order to afford a sufficient draft to always keep the spaces between the water-tubes fully supplied with fresh air, the object of the conduits 8 being to pass off enough of the fresh air at a point beyond the interior of the boiler, so that the products' of combustion iiowing around the water-drums from the conduits 7 shall not be too much cooled. It is not considered good boiler practice to allow fresh air to enter the combustion-chambers of steam-boiler at will, and various means are resorted to to control its admission; but in this boiler entirely different conditions exist, in this, to Wit: Each water-tube is surrounded by a sheet of live flame, andany amount of lair may be admitted among the tubes without in the least cooling them, as it cannot come into contact with them unless it should be allowed to enter in gusts or forcibly, which will not be the ease if the whole of the bottom of the boiler be left entirely open. rlhe longitudinal partition is shown as being hung from stringers laid over the top of the boiler, and the conduits for the escape of the products of combustion as passing through this partition and the hoods also, the ends of the conduits having a nut turned upon them or piece of refractory material attached thereto, and in this manner the hoods are suspended from the partition, the ends of the conduits passing through the partition being turned therein by means of a thread upon their ends; but they may be passed through the partition and have a nut turned upon their protruding ends. This manner of hanging the hoods keeps the weight of the hoods from pressing upon the tops of the water-tubes, a pressure which might do damage when the water-tubes were highly heated. I do not, however, confine myself to this manner of holding the hoods in position, as it may be done in numerous ways well known and that will readily suggest themselves; but I prefer the method shown as in all respects the best, especially in boilers having long tubes.

The hoods shown in Figs. 3 and 4 are intended for use in boilers or water-heaters where but one row of water-tubes are used, and in that case the chamber formed upon the hood itself will be found convenient; but for large boilers having numerous tubes,onc above the other, it makes but little if any difference which form is used. The hood shown in Fig. 5 is very simple, but not as efficient as the others, but can be used with some degree ol success, if desired, as it, like the others, compels the flame to more or less perfectly surround the water-tubes.

I do not confine myself to the form of conduits shown with which to carry away the products of combustion from under the hoods. I prefer the form of conduit shown; but any passage-way may be used that will accomplish the same end.

. I'Iaving described my invention so that those skilled in the art to which it appertains may make and use the same, what I elaim,a11d desire to secure by Letters Patent, is

1. A water-tube steam-generator having gas burners arranged under the water-tubes and hoods or bonnets arranged over said watertubes, said hoods or bonnets having conduits leading from them, the exit ends of said conduits terminating beyond the spaces formed between the water-tubes, substantially as de- 7o scribed.

2. A Water-tube steam-generator having gasburners arranged under the watentubes and hoods arranged over said water-tubes, said hoods having conduits leading from them, the exit ends of said conduits terminating in a chamber above said water-tubes, substantially as described.

3. Awater-tubesteam-generatorhavinggasburners arranged under the water-tubes and hoods or bonnets arranged over said watertubes, said hoods or bonnets having conduits leading from them and a partition or baffleplate laid over said water-tubes and below the steam and water drums, said partition or baffle-plate having openings through it, the upper ends of said conduits entering said openings in said partition or baille-plate, substantially as described.

4. A water-tube steam-generatorhaving gas- 9o burners arranged under the water-tubes and hoods or bonnets arranged over said watertubes, said hoods or bonnets having conduits leading from them and a partition or bailleplate laid over the watertubes and below the steam and water drums, said partition or baffle-plate having openings through it into which the exit ends of the conduits leading from the hoods are entered and also having other openings through it and conduits leading from said openings, the exit ends of said conduits terminating beyond the inclosed portion of the generator, substantially as described.

5. A water-tube steam -generator having hoods or bonnets arranged over the watertubes, said hoods or bonnets having conduits, the lower ends of said conduits passing through the hoods and having aprojecting piece ofrefractory substance attached to said lower end larger than the opening in said hood through which the conduit passes, the upper or exit end ofsaid conduit passing through an 4opening in a partition or baffle-plate laid above said water-tubes, the upper or exit end of said conduits having attached thereto a projecting piece of refractory lmaterial larger than the opening through the partition through which the conduit passes, substantially as described.

6. The combination, with the tubes of a tnbular heating device, cfa hood or bonnet arranged above the heating-tubes and burners arranged under the heating-tubes, the hood or bonnet having openings in it,and conduits leading from said openings, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER MORTON BROWN.

Vitncsses:

JULIUs F. HARRIS, HENRY V. Scar'rnncoon.

IOO 

